Nut-lock.



PATENTED OCT; 30, 1906..

' S. MATTHES.

NUT LOOK APPLICATION FILED nu 1.190s.

5 n7 wa 5m UNITED STA ES PATENT o EIoE.

. SAMUEL MATTHES, OF MANSFIELD, OHIO.

' NUT-LOCK.

to its practical application in the construction of mechanical devicesand machines; second, to construct aslmple and eificient lockingmechanism. 1- attain these and other objects by the mechanismillustrated in the accompanying drawings, in which Figure 1 is across-sectional view of the rail, fish-plate, nut, and lock. Fig. 2 is atop view of a nut, showing the oint of lockingpin projecting above thesur ace. Fig. 3 is a cross-sectional side View of a nut, showing aninclined aperture with tapered locking-pin inserted therein.

Referrin to the drawings, 1 indicates a sectional view of an ordinarynut, showing the point of .the locking-pin in contact with thefish-plate, A circular aperture 2 is formed in the face of the nut at anincline with'its face. I prefer to locate the aperture in the corner ofthenut, as is shown in Fig. 2 of the drawings, leaving a margin ofsufficient strength to resist the strain incident to tightening the nut.

It will be noted that the depth of the aperture is aboutone-half thethickness of the nut. I provide a tapered locking-pin 3, which isinserted in the aperture, as shown in Fig. 3. The point 4 is adapted toproject over the surface of the face of the nut, as shown in Fig. 3. Oneside of the tapered pin when the nut is being screwed up is adapted tolie adjacent to one side of the wall of the aperture, leaving a space 5,and as the nut is turned up and brought in contact with the surface ofafish-plate or other surface a slight impression is made in said surfaceby the point of the pin. The pin is tempered, so that when it is broughtin contact with the Specification of Letters Patent.

Application fiiea May 1,1905. semi No. 268,165.

Patented Oct. 30, 1906'.

surface it will not wear the pin, but will embed itself in the surfacewhich it is forced in contact with by the tightening ofthe nut.

It will be observed that this leaves the point embedded in the surfacewhen the nut is tightened.

The tendency of the nut to loosen or turn back is prevented by the pinwhen the nut is turned back. The point of the pin is forced to embed inthe surface more or less as it pivots on the bottom of the aperture, andas the nut is turned back it forces the point deeper into the surface.The pin pivots on the bottom of the aperture at an incline with thesurface and as the nut starts to turn back the point of the pin is madeto project to a greater extent above the surface as the nut is screwedup.

In order to prevent the pin from dropping out, the corner of the nut isupset, closing the aperture slightly. The nut can be tightened at anytime; but it is absolutely preventedby contact of the point against thesurface from becoming loose.

I do not confine myself to the use of one pin, as it is obvious that twoor more pins can be used with like effect.

Having fully described my invention, what I aperture with the baseresting onsaid support leaving the small end projecting over cir- 5port, a tapered pin inserted in said circular v the face with acircularv space surrounding a the small end of the pin, said pin havinga hardened upper portion to contact with the face of the fish-platewhereby said pin pivots on the bottom of the circular aperture whenbrought in contact with the face plate.

Signed at Mansfield, Ohio, this 26th day of April, 1905.

SAMUEL MATTHES.

Witnesses: JOH H. Coss, WILLIAM MATTHES.

of the fish-

